04-01-2013, 10:25 AM
I'm down to trying to restore my Majestic 20 chassis. I spent two days piecing the cabinet back together (it came as a 3-D jigsaw puzzle, thanks USPS). Fortunately, the speaker is in near mint condition.
I got a new power transformer for the set, a perfect fit, and have finally tracked down all the parts that are inside those lovely "black boxes".
Most of the repairs look like they will be pretty easy, but I do have a question that I hope someone here can answer for me:
What can I use to replace the "power detector"/audio driver transformer? I have a couple transformers that work in older TRF sets, but this set doesn't use a first audio amp: it drives the output tubes directly from the 27 detector. The plate voltage on this tube runs to 255 volts, almost 5 times the normal plate voltage for a detector tube, and its resultant higher plate current.
Does anyone have any suggestions re this? Or is there a chance that one of the old TRF driver transformers will work?
Thanks in advance.
I got a new power transformer for the set, a perfect fit, and have finally tracked down all the parts that are inside those lovely "black boxes".
Most of the repairs look like they will be pretty easy, but I do have a question that I hope someone here can answer for me:
What can I use to replace the "power detector"/audio driver transformer? I have a couple transformers that work in older TRF sets, but this set doesn't use a first audio amp: it drives the output tubes directly from the 27 detector. The plate voltage on this tube runs to 255 volts, almost 5 times the normal plate voltage for a detector tube, and its resultant higher plate current.
Does anyone have any suggestions re this? Or is there a chance that one of the old TRF driver transformers will work?
Thanks in advance.
